Reenforced rotary pivoted hammer



Mar. 6, 1923.

W. M. DAVIDSON REENFORCED ROTARY PIVOTED HAMMER Filed Aug. 21, 1922 I Patented Mar. 6, 1923;

UNITED STATES rattan rat-ant orrica- WILLIAM M. DAVIDSON, on sT.- LoUIs, MISSOURI, ASSIGNQR To WILLIAMS PATENT CRUSHER & PULVERIZER COMPANY, on ST. Louis, raissoonr, A CORPORATION or MISSOURI.

nnnnrononn ROTARY PIVOTED HAMMER.

' Application filedAua'ust 21,1922. Serial No. 583,238.,

To all whom 'it may concern." Be it known that I, WILLIAM M. DavinsoN, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improve ments in Reinforced Rotary P voted Ham- Iners, of which the following is a specification.

This invention relates to certain new and louseful improvements in reinforced rotary pivoted hammers,the peculiarities of which i I will be hereinafter fully described and claimed.

The main object. of myinvention is the provision of an effective reinforcement for the cast headof a rotary pivoted hammer having a shank of ductile metal such as wrought iron or'steel; and secondly, the arrangement of such reinforcement in the 20. cast head with respect to the shank, that the reinforcement is connected to the shank by detachable rivetsor bolts.

In the accompanying drawing on which like reference numerals indicate correspond- I ing parts, Fig. 1 represents aside elevation of a hammer embodying my improvements; and Fig. 2, a partial section on the l1ne 2-2 on Fig. l, and an edge view, of the shank.- I The-numeral designates a flat bar shank of wrought iron or steel having a hole 5 at one end for pivotal mounting in a rotor as usual in this form of hammer. A cast 7 head 6 is provided with downwardly extending walls 7 forming a rectangular socket adapted to receive the outer end 8 of the shank that. is slidingly mounted therein as shown in thefigures. The walls Tentirely surround the end of the shank,

I 4}) andthe head beyond the shank is preferably larger as shown in the figures, and in practice it has been found that the line of fracture of the head is commonly in. or near the transverse plane 33, although the fracture some times occurs at or near the end of the hammer shank in its socket.

I plan for reinforcement provides circular or oblong ring shaped pieces of wrought ironlor steel cast in the head subin planes of revolution so that the edges of shank and preferably also of the rings are presented to the front. Other reinforcement extends downward from the head into the side walls 7, as shown by the elongated rings 9, such a distancethat the fastening rivets 10 pass through the loop of 9' rings and through the end of the shank in the socket. Should any fracture occur therefore at or near the plane 3, the rings will hold the outer end of the head from disengagement. Should the fracture occur further inward such as below the head 6, the elongated rings 9 will hold the members together, and the rivets will tie the elongated rings to the shank itself whatever the position or location of the fracture that may ordinarily occur in the cast head.

Thus a socket hammer, so called, using metal of different characteristics may be rendered safe by my reinforcement against all ordinary fractures that may occur in the cast head.

' I claim:

In a rotary pivoted hammer, the combination with a shank, a cast head liable to fracture having walls forming a slotted recess in which is slidingly mounted the end of said shank, and transverse fastening means passing throughsaid shank and adjacent wall portions of said head. of ductile elongated ring reinforcements located in said wall portions and outer head portions, and embracing said fastening means, sub stantially as described and for the purpose set forth.

In testimony whereof I-have affixed my signature. WILLIAM M. DAVIDSON. 

